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Magnitude scale theory
Magnitude scale theory

... The magnitudes of stars - theory How bright a star looks is given by its apparent magnitude. This is different from its absolute magnitude. The absolute magnitude of a star is defined as the apparent magnitude that it would have if placed at a distance of 10 parsecs from the Earth. Consider two star ...
Lecture12
Lecture12

powerpoint  file
powerpoint file

... We are confident that very massive black holes exist at the centers of most galaxies. Black holes of a few solar masses are believed to form when massive stars undergo core collapse if the collapsed core exceeds the maximum of ~ 3 M permitted for neutron stars. The best evidence for such black hole ...
Lecture16
Lecture16

Astrophysics by Daniel Yang
Astrophysics by Daniel Yang

... gas absorbs certain frequencies and re-emits them in all directions, leaving the spectrum deficient in those wavelengths. The frequencies absorbed are identical to the frequencies it would emit when incandescent. - Describe the technology needed to measure astronomical spectra To measure spectra, li ...
Astronomy - SparkNotes
Astronomy - SparkNotes

1 How luminous are stars?
1 How luminous are stars?

Week 2
Week 2

... A. The star will reach its highest point in 3 hours. B. The star reached its highest point 3 hours ago. C. It isn’t possible to tell using the information ...
Part 2 - Stellar Evolution
Part 2 - Stellar Evolution

... For a degenerate gas, the ignition of helium burning will heat the gas, but do not cause expand The increased temperature makes the reaction go faster, which further heats the gas, which makes the reaction goes faster. This cycle of explosive nuclear reaction continues until temperature is high enou ...
10.1 The Solar Neighborhood Barnard`s Star
10.1 The Solar Neighborhood Barnard`s Star

INSIDE LAB 7: Measuring the Velocities of Stars
INSIDE LAB 7: Measuring the Velocities of Stars

... One of the best ways to understand stars is to look at their spectra. The spectrum of a star is a plot of the intensity of the light coming from that star as a function of wavelength. Although we like to pretend that stellar spectra are simply block body distributions, the reality is far more comple ...
Stellar Evolution Review
Stellar Evolution Review

... d) They have a very small surface area. ...
Hydrogen Greenhouse Planets Beyond the Habitable Zone
Hydrogen Greenhouse Planets Beyond the Habitable Zone

absolute brightness: The apparent brightness a star would have if it
absolute brightness: The apparent brightness a star would have if it

Prof. Kenney C lass 8 September 26, 2016
Prof. Kenney C lass 8 September 26, 2016

absolute brightness: The apparent brightness a star would have if it
absolute brightness: The apparent brightness a star would have if it

Scales of the Universe
Scales of the Universe

... or less. It radiates X-ray, ultraviolet, and visible radiation, plus streams of high-energy protons and electrons. A large flare can be a billion times more energetic than a large hydrogen bomb. ...
Star Types - College of Engineering and Computer Science
Star Types - College of Engineering and Computer Science

Star Cycle Balloons - Communicating Astronomy With The Public
Star Cycle Balloons - Communicating Astronomy With The Public

... 2. The student with the red balloon will go first, reading aloud Step 1 directions from the index card and carrying out the directions. The student with the yellow balloon goes next, in turn reading the directions for step 1 and following the directions. Students with the white and blue balloons fol ...
Life Cycle of Stars Activity
Life Cycle of Stars Activity

... 2. The student with the red balloon will go first, reading aloud Step 1 directions from the index card and carrying out the directions. The student with the yellow balloon goes next, in turn reading the directions for step 1 and following the directions. Students with the white and blue balloons fol ...
Stars
Stars

... fuse together inside a star, helium is produced. Heavier elements are produced when a star becomes a red giant. Only a supernova can produce elements heavier than iron, such as silver, gold and uranium. ...
Star Birth
Star Birth

... What have we learned? • Where do stars form? – Stars form in dark, dusty clouds of molecular gas with temperatures of 10-30 K – These clouds are made mostly of molecular hydrogen (H2) but stay cool because of emission by carbon monoxide (CO) ...
8th Ed【CH13】
8th Ed【CH13】

Universe ppt - Killeen ISD
Universe ppt - Killeen ISD

STAR UNIT FLASH BACKS
STAR UNIT FLASH BACKS

... behavior. Despite what most people may think, mice are actually very clean animals that organize their habitat into areas for eating, sleeping, bathroom needs, etc. ...
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Dyson sphere

A Dyson sphere is a hypothetical megastructure that completely encompasses a star and hence captures most or all of its power output. It was first described by Olaf Stapledon in his science fiction novel, ""Star Maker"". The concept was later popularly adopted by Freeman Dyson. Dyson speculated that such structures would be the logical consequence of the long-term survival and escalating energy needs of a technological civilization, and proposed that searching for evidence of the existence of such structures might lead to the detection of advanced intelligent extraterrestrial life. Different types of Dyson spheres correlate with information on the Kardashev scale.Since then, other variant designs involving building an artificial structure or series of structures to encompass a star have been proposed in exploratory engineering or described in science fiction under the name ""Dyson sphere"". These later proposals have not been limited to solar-power stations. Many involve habitation or industrial elements. Most fictional depictions describe a solid shell of matter enclosing a star, which is considered the least plausible variant of the idea (see below). In May 2013, at the Starship Century Symposium in San Diego, Dyson repeated his comments that he wished the concept had not been named after him.
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